You need to stop doing all the chasing! One of my friends when we go out has the same problem. When we are out, as soon as a guy comes chatting to her who she likes, she gives him all her attention. Men feel suffocated by this, even though girls don't think it means anything. And she ends up single still. There is a lot of meaning to the saying 'Be mean, and keep em keen'.
Also, be confident! Why the hell should you care what he thinks? If he likes you enough, then he won't be bothered of when you call him. So don't you worry about the minor little things like that in the dating game. Play it cool, and you will have them coming to you.
Enjoy life with your friends (I know how annoying it can be with marrried and attached friends), make new single friends, make the most of life whilst you are waiting for 'Mr Right' (by the way, he doesn't exist, everyone has faults, you just have to overlook them).